Pump



W. M. FLEMING AND N. E. BRIGHAM.

BY THEIR ATTORNEYS if d j Ff/fa,

INVENTOR W. IVI. FLEVHNG AND N. E. BRIGHAVI.A

PUMP.

APPLICATION FILED 1AN.27. 1921.

1,406,178, .Patented Feb. 14, 1922.

2 SHEETS-SHEET 2.

l i INVENTOR l BY THEIR A'roy/ UNITED STATES IPATENT OFFICE.

WILLS M. FLEMING, OF HOLYOKE, AND

NELSON E. BRIGHAM, SOUTH RADLEY FALLS, MASSACHUSETTS, ASSIGNORS To wonTHINGTo-N PUMP AND MACHIN- ERY CORPORATION, or NEW YORK, N. Y., A CORPORATION or VIRGINIA.

PUMP.

Y. Specification of Letters Patent. Pafented Feb 14, 1922.

Application filed January 27, 1921. Serial No. 440,283.

` To all whom it concern.'

Be it known that we, WILLs M. FLEMINe and NELSON E. BRIGHAM, citizensy of the United States, residing, respectively, at Holyoke, county of Hampden, and State -of Massachusetts, and South Hadley Falls,

county of Hampshire, State of Massachusetts, have invented certain new and useful Improvements in Pumps, fully described and represented in the following specication and the .accompanying drawings, forming a partof the same. 7

This invention relates to an improvement in 1pumps.

t is one object of the present invention to rovide a' reciprocating pump which shall.

e strong, durable, and so simple of construction as to enable its manufacture at low\ cost. We aim, also, to provide a pump, the' driving parts of which are so constructed and arrangedthat the pump may be manufactured as an independent or belt-driven unit, or adapted to be mounted on the frame of an internal combustion engine or the like and operated directly by the engine shaft.

It is a further object of the invention to so construct and locate the driving shaft bearings that they may bejmounted on but ventirely outside and independent of the pump frame, thus greatly simplifying and expediting boring and machining on the pump frame, as hereinafter set forth. These bearings are used when the pump is a complete unit, but omitted when the., pump is mounted On anengine.

It is a still further object of the invention to prevent oil leakage from -the shaft or crank casing and securel cooling of the bearingsby means located in the shaft or crank casing co-operating with a packed crosshead and'its guide, for producing a constant enpansion and circulation Y of cooling air l through the shaft or crank casing and along the shaftA and crosshead bearing surfacesl while the pump is working, such means not only ei'ectually preventing 1loss of lubricant,

but also permitting the pump to fbe run at" high speeds, if deslred, with minimum wear Y' and danger of overheating.- y In the accompanying drawings forming apart of this specification, a horizontal singleacting pump embodying the invention in its features forming the invention then specifi-'- cally pointed ou`t in the claims.

' In the drawings Figure l is a vertical central section longitudinally of the pump plunger;

Figure 2 is an irregular section on the line 2 2 of Fig. 1;

Figure 3 is a sectional end elevation on the line 3 3 of Fig. l; V F Figlure 4 is a section on the line 4 4 of Figure 5 is a vertical section of one of the outside main bearings;

Figure 6 is a section on the line 6 6 of Fig. 5, and

Figure 7 is a side elevation, partly broken away, showing the outside main bea-rings and supporting flanges removed, with the plunger eccentrically operated directly from an extension of the shaft of an internal combustion-engine and mounted thereon so as to form a single unit.

Referring now to the drawings, A india cates generally the cylinder casting, B the pump plunger, C, D the suction and discharge valves, E the discharge air chamber, and F the pulsation chamber formed by an enlargement of the cylinder Space. G is the cross-head formed b an enlargement of the pump plunger, Suita ly packed and working in an open ended ide 10, such crosshead and guide preferab y and as shown being of cylindrical form in cross-section. The crosshead G is linked by pin 12 to an eccentric connection 11 -on eccentric disk 13 keyed to the driving shaft H driven by belt pulley K. The shaft H is supported by bearings 1 fastened to-triangular anges 6 formed in that half of the split shaft casing which is part ofthe pump frame, such fianges having an Open space between themfor the eccentric connection `11, the bearings 1 being securely held in position'on the flanges by nuts 2 on the Shanks of headed studs 3 extending through and securing in place a removable ysection 4 ofthe shaft casing. Oil-retaining .pockets 5 are formed on the bearings 1 for catching the oil splashed into the top of the shaft or crank casing and oilingthe shaft, which oil drips into such pockets from either the rib 6 or 6', or from the studs 3, depending upon the direction of rotation of the shaft. y

The pump plunger B is provided with an outside stuiiing box and packing gland c, and the suction and pulsation chambers with a removable cap d, which may or may not embody a suction air chamber as shown at e in Fig. 7, such cap permittlng ready access to the suction valve.

The pump may be mounted directly on the frame of an internal combustion engine or the like, and with its eccentric directly mounted on the shaft of such engine as indicated in Fig. 7 with no alteration of the pump frame, the main bearings 1, one of which is located on each side of the shaft casing, being each formed as a complete bearing unit, as shown in Figs. 5` and6, so that they are entirely outside and independent of the pump frame, thus enabling such bearings tov be readily dispensed with when the pump is to be thus connected. In this construction of Fig. 7 the internal combustion engine is indicated generally by the letter X, and the pump frame is secured thereto by bolts 8. The section 4 of the shaft ory crank casing of this construction may be secured by outside anges on such section and the pump frame, bolted together, or in any other suitable manner.

To prevent loss of lubricant'by leakage, and to maintain'a constant expansion and circulation of cooling air along the crosshead and shaft bearings and in the shaft casing when the pump is running, there preferabl is provided an outwardly opening valve in the shaft casing, by the provision of which a partial vacuum will be produced in such casing due to displacement of air therein by the crosshead Gr on the suction stroke and the formation of a partial vacuum on the outward stroke, which will tend to cause leakage air to enter along the crosshead and the shaft bearings, thereby preventing leakage of oil at these points, while the air expansion in the shaft casing and its constant renewal by cool air leaking into the shaftcasing, will produce a coolln effect o'n the bearings, which aids in running the pump at high speeds.

It will be seen that, by forming the pump frame with the removable section 4 and making the main bearings independent of the pump frame, access is provided at the shaft en d of the pump for boring and machining Athe pump frame and cylinder openings. lThus, in the construction shown, the front and rear endsy of the cylinder and all parts of the construction requiring milling, are readily accessible .to the milling machine, there being no main bearings to prevent milling the shaft end of the frame. The crosshead guide also maybe bored with a full sized bar passing infrom the shaft end of the frame and, with three cutters on this bar, the crosshead guide, the stuffing box,

and the plunger throat may be machined at drilled and tapped through from the shaft end of the frame.

It will be understood that the independent bearing feature shown and described is not limited to use with a pump of the type illustrated, but is applicable with other types of pumps, and that the air circulationfeature may be used otherwise than in pumps. It will be understood, also, that theconstruction shown as embod ing the invention may be varied while retalning the invention defined by the claims.

What is claimed is:

1. A pump comprising a frame having a pump cylinder and crosshead guide integral therewith, an outside'packed pump plunger and crosshead Working in said cylinder and guide, a shaft and connection to the crosshead for reciprocating said plunger, and a sectional crank casing having a removable section at the shaft end of the pump in line with the crosshead, whereby the .crosshead guide and plunger openin may be machined from the outer end o the pump.

2. A pump comprising a frame having a pump cylinder and crosshead guide integral therewith, an outside packed pump plunger and crosshead working in said cylinder and guide, a shaft and connection to the crosshead for reciprocating said plunger, a sectional crank casing having a removable section at the shaft end of the pump in line with the crosshead, and removable shaft bearings in said casing, whereby the crosshead guide and plunger opening maybe machined from the outer end of the pump.

3. A pump comprising a frame having a pump cylinder and crosshead guide integral therewith, an outside packed pump plunger and crosshead working in said cylinder and guide, a shaft and connection to the crosshead for reciprocating said plunger, a sectional crank casing having a removable section at the shaft end of the pump in line with the crosshead, removable shaft bearings in said casing, whereby the crosshead guide and plunger opening may be machined from the outer end of the pump, and a removable cap on the outer end of the pump cylinder.

4. A pump -comprisin a frame having a pump cylinder and tubu ar crosshead guide integral therewith, an outside packed pump plunger and cylindrical crosshead working in said cylinder and guide, a shaft and connection to the crosshead for reciprocating said plunger, -a sectional crank casing having a removable section at the shaft end of the pump in line with the crosshead, and removable shaft bearings in said casing.

5. A pump comprising a frame having a pump cylinder and crosshead guide integral therewith, an outside packed pump plunger and crosshead working in said cylinder and guide, a shaft and connection to the crosshead for reciprocating said plunger, a sectional crank casing having a removable section at the shaft end of the pump in line with the crosshead, bearing supporting flanges formed on the frame section of said casing, and shaft bearings removably mounted on said anges.

6. A pump comprising a frame having a pump cylinder, crosshead guide and crank casing section integral therewith, a removable crank casing section, a pump plunger, a shaft and`connections for reciprocating said plunger, bearing-supporting flanges on the fixed part of said crank casing, and removable shaft bearings mounted on the outslide of said flanges,whereby the shaft' may be withdrawn sidewise at the end of the pump.

7. A crank casing having a crosshead Working in a tubular guide to force air from the casing, and an air valve on said casing opening outwardly to the atmosphere.

8. A pump comprising a frame having formed therein a cylinder A and integral crosshead guide'lO, outsideJ packed plunger B and crosshead G, and shaft connections 11, 13.

9. A pump comprising a frame having formed therein' a cylinder A and tubular crosshead guide 10, outside packed plunger B and cylindrical crosshead G, removable bearings 1. in the crank casing, and removable casing section 4.

, In testimony whereof, we have hereunto set our hands.

WILLs M. FLEMING. NELSON E. BRIGHAM. 

